4-Pole Magnet Adjustment; Defocus Adjustment; Electrical Adjustments By Remote Commander - Sony KP-43T100 Service Manual

Use the center dot

2-7. 4-POLE MAGNET ADJUSTMENT

(GREEN, RED, BLUE)
1. Display a dot pattern (see the details of using the internal test
patterns at the end of section 2-5, item 4).
2. Enter the service mode.
3. Cover the red and blue CRT lenses with lens caps to allow only
green to show (or use the method shown in the note below for
turning off the CRTs individually without using lens caps).
4. Turn the green focus control on the focus block to the left and set it
to under-focus to enlarge the spot.
5. Adjust the 4-pole magnet so that the enlarged spot in the center of
the screen becomes a perfect circle.
6. Adjust the green focus control on the focus block and set it for the
best focus.
7. Repeat steps 1 through 6 for the red CRT, except now you will
cover the green and blue CRT lenses with lens caps to allow
only red to show (or use the method shown in the note below
for turning off the CRTs individually without using lens caps) and
you will adjust the red focus control on the focus block.
8. Repeat steps 1 through 6 for the blue CRT, except now cover the
green and red CRT lenses with lens caps to allow only blue to show.
Adjust the blue focus control on the focus block (or use the method
shown in the note below for turning off the CRTs individually without
using lens caps). However, for the blue CRT do not make the
enlarged spot a perfect circle as indicated in step 5; instead, adjust
the 4-pole magnet so that the height of the enlarged blue spot in the
center of the screen is approx. 1.5 times the width of the spot.
Note: If lens caps are unavailable, you can cut off the unnecessary color
beams in the service mode by individually changing the data from "1"
to "0" in category VPNT, item 28 RON (red), item 29 GON (green), or
item 30 BON (blue).
Use the center dot
2-8. DEFOCUS ADJUSTMENT (BLUE)
Note: Adjust the blue dot to be slightly larger than red and green dots.
This adjustment provides a more pleasing picture to the customer.
1. Select the video menu and set the picture mode to "VIVID".
2. Enter service mode.
Large de-focused spot
Small focused spot
x
y
x : y = 1:1.5 (BIue)
x : y = 1:1 (Green, Red)
3. Change TV mode to the video-1 input mode.
4. Select adjustment category "PJE", and press 6 as many times as
necessary to display the dot pattern on the screen.
5. Adjust the blue focus control on the focus block to adjust the
diameter of the dots in the center of the screen as shown in the
fi gure below.
FOCUS ADJUSTMENT POINT:
Screen Size
Diameter
2-9. ELECTRICAL ADJUSTMENTS BY
REMOTE COMMANDER.
By using Remote Commander (RM-Y906), all circuit adjustments can
be made.
Note : The following test equipment is required:
1. Pattern Generator (with RF, composite, and component outputs)
2. Digital multimeter
2-9-1. METHOD OF ENTERING THE SERVICE
ADJUSTMENT MODE
SERVICE MODE PROCEDURE
1. TV must be in Standby mode. (Power off)
2. Press "DISPLAY", 5, "Volume +", then "TV Power" on the Remote
Commander.
(Press each button within 1 second of pressing the previous button.)
SERVICE MODE ADJUSTMENT
Category Adjustment item
SERVICE VPNT VPOS 031
000000 00
(SCREEN DISPLAY)
3. The screen displays the adjustment category and the item being
adjusted within that category.
4. Press 1 or 4 to select the adjustment item
5. Press 3 or 6 to change the data
6. Press 2 or 5 to select the adjustment category
7. If you want to go back to the most recently saved value, press "0"
then "ENTER" to read the memory.
8. Press "MUTING" then "ENTER" to write the new adjustment data
into memory.
9. Turn power off when you want to exit the service mode.
— 16 —
KP-43T100/53SV100
Dmm Max
43" 53"
6mm 8mm
DATA